Exactly what Lady C said in her video. He could have been making it known about his MH to cover any transgressions that would come out.
Not specific to HE but in general,
The completed suicide rate for people who Narcissistic Personality Disorder is commonly stated to be exceptionally high, around 10% even, often with the person showing no prior sign and not having asked for support or help or made threats or warnings (unlike people with BPD who have an equally high or even higher risk around or above 10% but are usually known and frequently ask for help or make multiple prior attempts).
It is also a fact that people with any antisocial, narcissistic, or criminal types of personality tend to be high risk of premature death that could be considered a form of indirect suicide for multitudes of reasons that could be over-arching described as reckless or high risk or careless activities, such as participating in extreme sports, driving dangerously, hanging out with dangerous people, or using drugs etc.
When one really starts to get into it, it's very clear to see that anyone controlling and abusive or criminal is also maybe at least one of the 10% high suicide and probably in the 'indirect suicide' risk also.
The problem is that how does society or the criminal justice system or employers or even the victims of the abuse themself 'manage' that because people can't just buy into the notion of 'you can't hold me culpable, I'm suicidal, I could die' ?